Microsoft has launched a new set of discounts for Xbox 360 owners today. Xbox Live Gold subscribers and everyone else can pick up full games and DLC packs on the cheap until April 21st.

The discounts should make many open-world game fans happy. The games on sale range from Prototype 2 to Assassin's Creed 4. These deals are available to all Xbox 360 users for the week (via Major Nelson):

Assassin’s Creed IV Season Pass - 33% off

Assassin’s Creed IV Add-ons - 33% off

Saints Row IV - 50% off

Saints Row IV Add-ons - 66% off

Dead Island Add-ons - 75% off

Dishonored Add-ons - 75% off

F1 2013 Add-ons - 50% off

Borderlands 2 - 65% off

Borderlands 2 Add-ons - 50% off

Armored Core Verdict Day Add-ons - 75% off

Skyrim Add-ons - 75% off

Fallout 3 Add-ons - 75% off

Tropico 4 Add-ons - 50% off

Fallout: New Vegas Add-ons - 75% off

The Walking Dead Season 1 chapters - 50% off

Wolf Among Us Ep2: Smoke and Mirrors - 50% off

Pinball FX 2 tables - 50% off

Toy Soldiers add-ons - 67% off

PAC-MAN CE DX - 50% off

PAC-MAN CE DX Add-ons - 50% off

Lego Marvel Super Heroes - 33% off

Assassin’s Creed Liberation - 33% off

Prototype 2 - 75% off

Thief: The Bank Heist - 50% off

State of Decay: Breakdown - 50% off

The most unfamiliar name on the list for most of you will probably be State of Decay. SoD is an open-world zombie game that debuted on Xbox Live Arcade last year. Players create a community of survivors and must protect them from the undead and keep them well-supplied. The Breakdown DLC introduces a new Sandbox mode that removes the story missions and lets the player reset the game world with a higher difficulty level.

Microsoft did save a few deals just for Xbox Live Gold members. You'll need a Gold subscription to get this smaller list of savings. The Deals with Gold for this list have a Batman theme:

Injustice: Gods Among Us 50% off

Injustice: Gods Among Us Season Pass 50% off

Batman Arkham City 75% off

Gotham City Impostors 75% off

Batman Arkham Asylum 75% off

Lego Batman 2 67% off

Batman Arkham Origins Season Pass 50% off

Batman AO: Initiation 50% off

Batman AO: Infinite Earths Skins Pack 50% off

Batman AO: New Millennium Skins Pack 50% off

Batman AO: Deathstroke Challenge Pack 50% off

Batman Arkham City: Harley Quinn’s Revenge 75% off

Batman Arkham City: Arkham City Skins Pack 75% off

The only Batman: Arkham Origins DLC not on discount is the Cold, Cold Heart add-on. Cold, Cold Heart is a story-based expansion featuring Mr. Freeze and the last DLC for the game. It won't be released until April 22nd, the day after this spring sale ends.